Combination coal and gas range.



H. C. DIETRICHJ COMBINATION COAL AND GAS RANGE. APPLICATION FILED JULY 31.191

1,234,642. Patented July 24,1917.

2 SHEETS-SHEET lgwvemtox H. C. DIETRICH.

Patented July 24, 1917'.

2 SHEETS-SHEET 2- I STATES PATENT F C 1 HENRY dnIn nIoH, on nvANsvI LE, INDIANA, ASSIGNOR T cnnsonN'r s'rovn WORKS, OF-EVANSVILLE, INDIANA, A CORPORATION OF NDIANA.

. COMBINATION CbAL AND GAS RANGE.

To all whom it may 0mm.-

Be it knownthat I, HENRY, G. Drn rnron, a citizen of the United States, residing at Evansville, county of Yanderburg, and State arrangement of heatwopenings in the sidewalls of the oven through which heat from the gas burners in the casings. may have access to the interior of the oven.., 7

By dispensing with the dampers, the con -struction issimplified, cheapened, rendered easy to operate and prevented fromjgetting out of order and instead of relatively large amounts of oven space being. occupied by portions of the dampers, the entire interior of the, Oven is rendered available for use. In the present invention, as in my Patent 1,198,707, the valve which controls the flow of gas to, the burners in the respective com.- partments at opposite sides of the oven,

-also operates 'means for opening a flue damper .so.that the heat is taken off from the. oven when the gas burners are used.

When coal isused, the gas valve being then closed, the flue damper is also closed cutting Ofi' communication between the oven and the flue so that, during the use of coal none of the" products of combustion can enter the ovenand it is heated bycontact'with the exterior of the wallsthereof.

Being aware that changes may be resorted to in carrying out the present invention, the disclosures herein given are to be considered asillustrative, rather than restrictive, of the scope of the invention.

In the accompanying drawings:

Fi re 1 is a front perspective of a combination coal and gas range having my improvements, certain. parts being removed and others broken away;

Specification of Letters iatent.

Fig. 2, a vertical section; 7 Fig. 3, a side elevat on; Flg. 4:, a rear elevat1on;.and

ative connection to the rocker shaft.

of how my improvements are applied: theret The firebox appears at l,the oven at2, the

usual flue around the oven at .3 by which the products of combustion from the firebox to, and the take-01f flue at 4 V.

The oven 2 is provided with casings,

heat the oven without having access there Patented J uly 24, 1917."

Application filed July 31, 1916, Serial No. 112,339.

u. Fig. 5, a detail view, partly section, of K the valve and adjacentparts and itsope'rchambers, or compartments 5 on opposite sides thereof, the one at the left (Fig. 2)

being supplied with air in any desired-manner, as for instance, by a permanentlyopen port 6., The compartment 5 at the righthand side of the oven ,issupplied withairthrough permanently open ports 7 at the front and rear of the range-" Theco-mpait ments or casings 5 extendsubstantially the full length of the oven, exteriorlythereof, from front to rear. The upper portion of. the compartments 5 are in communicationv with the central or upper portion of the oven'by slots 9. The lower portion ,of the casings 5 communicate withthelower portion-of the oven through numerous holes or openings 10. which are preferably arranged in rows, the rows being one above the other, and all of them below the slots 9. Unlike the side ,oven walls of the range of my.

patent aforesaid, the side walls of the oven;

of the present invention are solid and stationary except for the slots" 9 and theopen ings 10. Rows of lugs 2 may be provided at different heightson the side walls to sup. trays, as. usual in gas heated.

port racks or ovens.

I have discovered the... oven of my patent aforesaid may be dispensedv with. and the casings or compartmentsmay remain at all times in communication with the oven 2 through the slots 9 and openings 10. By dispensing with the dampers, not

only is the construction simplified and the 7 cost of manufacture greatly lessened, not to mention improvement in respect to liability of derangement, but the entire interior of the oven is unobstructed and much valuable heating space otherwise occupied by the dampers in their movements, is obtained.

Contained within the chambers or compartments 5 are gas burners 11 and 12 which are provided with flame discharging slots or openings 13 and 1 1. The burners extend nearly the full depth of the casings or compartments 5 from front to rear thereof. Each burner directs heat to the slot 9 and openings 10 leading from its compartment 5 to the oven 2.

When coal is used instead of gas, the products of combustion, after. passing through the flue 3 around the oven, pass out into the flue 4 without having access to the casings 5, and hence such products of combustion cannot enter the oven at any time. 3

'While it is desirable to use burners and casings at both sides of the oven, I am aware that only one burner and one casing might be employed.

At the rear of the oven are exit openings 21 for the outward passage of the heat when the oven isheated by'gas, thus insuring free circulation through the oven. The sliding rear damper plate 22 (Fig. 4), is adapted to open or close the ports 21 according to whether the gas valve 23 is opened or closed.

At the rear of the range is a sliding bar 24: which carries, or is connected to, the damper 22 and has slots into which project studs or screws 26.

At the side of the range is a rock shaft- 27 which is suitably mounted in brackets 28 and has a crank end 29 which plays in the slot 30 of a rocker 31 which is pivoted at 32 and has a slot 33 which loosely receives a pin 34 on the bar 24. The valve 23 which controls the admission of gas from the supply pipe 35 to the burners 11 and 12, there being a branch pipe 37 for burner 11, is adapted to turn the shaft 27 when admitting or cutting off the supply of gas to said burners. The arrangement and con nections may be those shown in Fig. 5. The valve extends through the casing 36 and v has a square socket 37 which detachably receives the squared end 38 of the shaft 27.

The air inlet or mixer is shown at 39. When the valve 23 is opened, the rock shaft 27 opens the damper 22 so that the heat passes out of the oven when the gas burners are being used. The extent to which the valve 23 is opened will determine, not only the G cpies of this patent may be obtained for flow of gas to the burners, but also the extent of opening of the damper 22. The volume 'of heat and circulation through the oven is thus regulable at will so that any desired heating effect may be obtained when the burners 11 and 12 are lighted.

If it is desired to heat the oven by coal, the valve 23 being closed, the damper 22 is thereby closed and the flue 4c is sealed from the oven 2 so that the products of combustion from the firebox cannot enter the oven.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a range, the combination with an oven having permanently open ports communicating with lower parts of the oven and also with parts well above the lower parts of the oven, of a burner casing from which said ports lead, a permanently open' air inlet for said casing, a gas burner in said casing adapted to supply heat to all of said ports, and a valve controlling the.

flow of gas to said burner.

2. In a range, the combination with an oven having permanently open ports at lower parts of the oven and also well above the bottom of the oven in different walls thereof, of'burner casings from which the ports in the different oven walls lead, permanently open air inlets for said casings, gas

burners in said casings adapted to supply heat to all of the ports leading from that casing, and a valve controlling the flow to all of said burners. I

3. In a combination coal and gas range,

a fire pot, an oven, a take-off flue, a heating flue through which the heat may travel from the fire pot to the take-off flue, a

burner, a take-01f port connecting the oven with the take-0E flue, a damper for said take-off port, and means for automatically opening said damper when the gas valve is opened and closing said damper when thegas valve is closed, whereby when gas is used, the heat is taken off from the oven and when coal is used, the products of combustion are prevented from entering the oven.

In testimony whereof, I hereunto affix my signature.

"HENRY c. DIETRICH.

five cents each, by addressing the Gommissioner of Patents, Washington, D. c. 

